Possible hijack, Spybot keeps finding

And that's just for starters. I'm guessing my other problems may be related to this, but I'll let you experts here figure that out

Anyway, when I run Spybot, I keep getting a Possible Extension Hijack. (see the log below.) I have tried to fix this several times, and while Spybot tells me it has done so, the darned thing keeps coming up again. Would you also be able to tell me why, when I uncheck the products I think are checked by default so that they won't be excluded, Spybot is not remembering this? (I have the "save all settings" cookie enabled under Settings.)

Now for the other problems I'm having. I have tried several times to DL a couple of critical updates, one each for IE 6.0 and WinME from Microsoft's website. I notice that they are both security patches, BTW. The progress message box opens but nothing happens. This is the only thing that hangs up. The computer otherwise seems to be functioning OK. If I hit "cancel", I get the message asking me if I want to send an IE error report to Microsoft or not. I sent it twice but the other times did not. Either way, IE closes. Also, tonight I have not been able to access anything via links. A window will open, smaller than my main window, and will say Microsoft Internet Explorer in the title bar, but other than that, I will only see the frame. I'm not even getting a blank screen, just seeing what is in the main window reappearing in the new window. If I move my cursor over the new window, I get the "working in the background" pointer. Again, this will be the only thing that hangs up.

Also, the last couple of times I started the computer, McAfee Virus Scan first apparently didn't load completely (the icon in the tray was all blue, instead of blue & red as when it has completely loaded) then didn't start at all (no icon in the tray). That last has always happened once in a while since I installed the program, but it just started doing it again with all this other happy stuff that's going on!

Finally, the reason I loaded Spybot to begin with is that, even though I have McAfee Internet Security 5.0, a few times I didn't notice that Guardian hadn't run on startup like it's supposed to until I was already on the net, or when it was running I accidentally hit yes when an Identity Information Alert screen would come up for an unidentified site. Because of this, and because I seemed to suddenly have lost a lot of MG's on my hard drive, I DL'd Spybot and Index.dat Suite. (I still seem to have a lot of memory being taken up. I can't explain it unless the Virus Scan updates are a lot bigger than I thought!) As I have very little memory to start with, I'm trying to salvage all I can get. Since I'm stuck with this ol' piece of **** indefinitely, anything you could do to help me out would be greatly appreciated!

As per your recommendations, I DL'd HijackThis! (couldn't use your link, tho. See above) and here is the log from that:

I just noticed that on the Spybot log, Lexstart.exe shows twice on my list of startup items, once enabled and once disabled. Also that LEXPPS.exe and LEXBCES.exe were on the running processes list. All of these refer to my printer. I have noticed the last two things showing up on the task manager sometimes when I am not printing anything. All of this is so frustrating!